Desk-telephone and switching mechanism.



,PATENTEE MAY 14, 1907.

* A. K. ANDEIANO. I DESK TELEPHONE AND SWITCHING MECHANISM.

APPLLOATION FILED JULY22, 1905.

MMMMMMMM THE NORRIS PE1ERS co., wxsnmuron', D. c.

UNITED VSTATE PATENT OFFICE.

ALBERTKOCH ANDRIANO, OF SAN FRANCISCO, CALIFORNIA, ASSIGNOR TO DIRECT-LINE GENERAL TELEPHONE COMPANY, OF SAN FRANCISCO,

CALIFORNIA, A CORPORATION. v

DESK-TELEPHONE AND SWITCHING- MECHANISM.

Specification of Letters Patent.

Patented May 14, 1907.

Application filed July 22, 1905. Serial No. 270,758-

This invention relates to a novel telephone outfit for a subscribers use,'of such form and construction that it can be placed in one of the pigeon-holes or compartments of an office-desk where it will be out of the way, and yet will be always at hand for use. In an outfit of this'character, consisting of a transmitter and a receiver, and a lincswitching means for selecting and making connection with the lines of other subscribers, the stand, case or box that incloses the switchingmechanism also furnishes a support for the transmitter and receiver. I

One object of the invention is to produce a combined switching device and asupport for the transmitter and receiver of such form that the case or box containing the same can be set in the pigeon-hole of a desk and the instruments conveniently operated in that position.

The invention has for its object, also, to so connect or combine the transmitter and the switching-device that in operating the switch to set up a circuit with another station the user is compelled to move the transmitter and thereby agitate the particlesof carbon as often as the switch is moved.

A further object of the invention is to so combine or arrange the parts of the telephone that the receiver will cover the transmitter, and the two instruments will mutually protect their diaphragms while the receiver remains on its hook.

T o these ends and objects, chiefly, the invention consists in certain novel construction and combination of box or case, transmitter and line-switching mechanism, as hereinafter fully described and afterward pointed out in the claims at the end of this specification.

The accompanying drawings referred-to in the following description illustrate a telehone outfit adapted .to sit in a pigeonole'compartment of an oifice-desk, and embodying the several features of my invention.

Figure 1 represents the complete outfit or apparatus in side-elevation, with the receiver in place on the hook; Fig. 2 is a frontelevation, showing a portion of the outercase broken away to expose the dial-plate of the switch. Fig. 3 is a side-elevation similar. to

Fig. 1, but with the casing removed and the receiver off the hook. Fig. 4 is a transverse section taken through Fig. 3 on the line 44,

showing the stationary-contacts and the movable-contact of the line-switch. Fig. 5 is a transverse sectional-view at 55 showing the circle of stationary contacts that are situated on the right side of the section-line. Fig. 6 is a sectional-view taken through 66 showing the circuit-closing contacts situated on the back panel of the case that are controlled by the telephone-hook. Fig. 7 .is a rear-view of Fig. 5. Fig. 8 is a longitudinal vertical section of a portion of the apparatus, the first panel and other parts being omitted.

The switching-mechanism, by the construction and arrangement of its parts, is capable of being contained in a case or box of small dimensions and of a size that will readily slip into one of the pigeon-holes, or com partments, usually provided in the front of an office-desk.

Referring to the drawings in the following description, A indicates the box or case; T,

the transmitter; R, the receiver and H, the

telephone-hook. The front-plate a, the baseblock a of insulating fiber, and the upright blocks or panels a a a of the same insulating material may be termed the frame of the device. This frame is inclosed by a cover com osed of the top B and the sides C-C,

whic is made removable to afford access to the parts.

On the front and intermediate panels a a arethe stationary contacts 23, 45 of the switch through which the conductors of the local transmitting and receiving circuit are combining the transmitter and the switch so that the transmitter forms or furnishes a hand-piece for rotating and setting the movable-member from one switch-point to an other; and in carrying out this part of the invention the transmitter is formed with a cylindrical extension, or hub 7, on the back, and sockets in which it is fitted to turn, are provided in the center of the circle of switchcontacts on both panels. The switch-piece b is fixed on that part of the hub 7 which lies between the two panels a -a and the portion of the hub that passes through the panels is of smaller diameter than the portion lying in front of the first panel a A collar fixed on that end prevents the hub from being drawn out of place. The hub 7 serves also as a conductor to make continuous metallic connection between the transmitter'T-and the internal wiring of the instrument, for which purpose it is composed of the outer metallic sleeve carrying the collar 10, and a central core 12, which is separated from the sleeve by insulation 13. The end of the core 12 extending beyond the sleeve is uncovered as seen at 12 Figs. 7 and 8, and on this exposed portion of the core a conducting strip 15 fixed on the back of the panel a makes continuous contact. A similar strip 16 rests in like manner on the collar 10, and the two strips serve to connect the wires of which they are the terminals on the panel a separately and directly with the inner and the outer conducting portions of the hub 7 under all changes in the position of the transmitter produced by rotating to operate'the switch.

The circle of stationary-contacts 2 on the front face of the panel a are the individual terminals or switch-points of the incoming line-wires from the other stations in the system, and the contact-arms b b of the switch-piece b, by connecting any selected one of these switch-points 2with the centrally placed contact-ring 3 operate to close the circuit through the selected line-wire and the conductor of which the ring 3 constitutes the terminal in the switch.

Stationary contact-rings 4-5 on the op posing face of the panel a in front are situated in the ringing-circuit, and as they are electrically connected or separated by the second set of contacts 6 b on the switch-piece they close or open the circuit through the ringingbattery and the bell at the opposite station on the selected line according to the position given the switch-piece in the adjustment of the first-mentioned contacts b b*, whether set to close a line-circuit, or else moved off the line-contacts to select and set up a different circuit.

A switching-mechanism of this character for selecting and controlling circuits for talking by the operation of the ringing-circuit has been made the subject of aseparate application by me in an application dated March 15 1905, Serial No. 250,154, and I do not consider it necessary to describe more specifically the construction and operation of the two sets of contacts for completing separate ringing and talking circuits, by the movable switch-piece, because the same form no part of the present invention, that may, or may not, be provided with the set of contacts 4-4) in connection with the principal switch-eontacts 23 according to the particular style or construction of switch required for the circuits or system in which this mechanism is to be used.

The position of the movable-memlier of the line-switch is indicated to the user in the well-known manner by a dial-plate 20 fixed on the hub 7 of the transmitter behind the front-plate a of the case, in which a sightaperture 21 exposes to view one switchmunher at a time. The back-panel a. furnishes a support for those circuit-closing springs that are controlled in the usual way by the telephone-hook; one set 22'23 being connected together to close the circuit for ringing up the station while the receiver is on the hook, but the other sets bl--25, 26-27 being disconnected at such time, and only connected when the receiver is taken down for use. The arm H of the hook is pivotall; attached at 28, on the front panel a" of the frame, from which point 28 one arm or member ft extending rearwardly is connected to a circuitclosing lever 30 by a link or connection 3 and the other member 72% in front of the pivot extends beyond the frame at the front to furnish a support for the receiver R. The arm 71 is of such length that the hook-bearing end 71 when depressed by the weight of the receiver will support the receiver in front of and hold it against the mouth-piece t of the transmitter T, as seen in Fig. 1, in which position the mouth-piece will be covered, and will in its turn cover the end of the receiver.

The style of telephone-rcceiver used in this outfit, and illustrated in the drawing, com monly known as a watch- :ase receiver, is by its shape well adapted for the purpose of constituting a cover or protector for the transmitter, and also by its compact form and small size taking but little room when hanging on the book.

The manner of wiring the instrument to connect the switching mechanism with the line-wires will be readily understood by those who are familiar with setting up and operating telephone-circuits of the kind in which a switching-device is provided at every station for making connection and ringing-up other stations without the interposition of a central office. The line-wires are individually connected to the posts 32 on the back of the panel a", so that the stationarycontacts 2 on the front-face of the panel form terminals of all the linewires. The intermediate stops 2* in the circle are blank stops arranged to separatethe line-contacts 2. The contact-stops in the circle on the back of the first panel a are metallic parts of the ring 4 through which the arm 5 b of the switch piece by its contact therewith and with the ring 5 completes a circuit through the ringing-battery to 0 erate a circuit-controlling device interpose in the talkin -circuit-as before referred to. The arm b of the switch-piece closes the circuit between the stationary contact-ring 3 of the line-switch and that particular one of the line-terminals on which the movable arm b may be placed by the rotation of the switch-piece b to select the line. A simple rotation of the mouthpiece If to. the right or left will bring the switch onthe desired line, the position being indicated at the sight-aperture in the front of the case. Each operation of the switch thus produces'rearrangement of the carbon particles in the transmitter; and special attention or treatment of the transmitter from time to time to agitate the carbon is altogether unnecessary. As often as the telephone is used the transmitter must be rotated to make the switch.

Having thus described my invention, what I claim is 1. A telephone outfit comprising a case containing the terminals of a plurality of lines, a movable transmitter having a mouth piece at the front of the case, a line-selecting switch connected with and moved by the transmitter, a receiver adapted to cover the opening of the said mouth piece, and means for holding the receiver in position against the mouth piece when not in use, substantially as set-forth.

2. In a line-selecting telephone outfit a case, a transmitter therein movable to effect the line-selecting and having its mouth-piece on the front of the case, a receiver adapted to cover the mouth-piece, and a pivoted telephone-hook arranged to hold the receiver in position against the mouth-piece of the transmitter, andalso to control the switches of the local telephone outfit.

3 In a telephone outfit, a case, a lineswitching-mechanism having a movable switch-piece, a series of stationary contacts and a transmitter movable in the case and connected with the movable switch-piece whereby the adjustment of the switch-piece is effected by moving the transmitter.

4. In a line-selecting local telephone outfit, the combination of a case, line contacts within the case, switching mechanism therein, a movable switch-piececo-operating with the said line contacts, and a rotatable transmitter adapted to form the setting means for the switch-piece.

5. In a telephone outfit, the combination of a case, a series of stationary contacts for the ringing circuit, a series of stationary contacts for the talking circuit, a movable switchpiece for each of said circuits, and a transmitter movably mounted in the case and arranged to set the said switch-pieces when moved, substantially as set forth.

6. In a telephone outfit, the combination of a case, a series of stationary contacts for the ringing circuit, a series of stationary contacts for the talking circuit, a transmitter rotatably mounted in the casing, a pair of switch-pieces secured to the transmitter and arranged to move therewith, and an insulating center-piece between the pair of switchpieces,,substantially as set forth.

7. The combination of a case, a transmitter rotatably mounted therein, a switchingdevice containing stationary contacts in a circle around the axis of the transmitter and a movable contact connected. with the transmitter'and adapted to move over the stationary contactsand to be operatively set thereto by the rotation of the transmitter.

8. The combination of a case, a transmitter rotatable therein, a circle of switch contacts having the axis of rotation of the transmitter for its center, a rotatable switch-piece adapted to be set by the rotation of the transmitter, and means for limiting such. rotation.

9. The combination of a case, a circle of switching contacts therein, a transmitter rotatably mounted in the case, having a hub coincident with the center of said circle of contacts, and provided with a member forming a movable contact-piece to the switching contacts.

10. In a telephone outfit, a switching device containing stationary contact-points in a circle, a rotatable contact-piece arranged axially of said circle for rotation in the case and a transmitter connected with the rotatable contact-piece and constituting the means for setting the contact-piece, and means for indicating the position of the contact-piece.

11. In a telephone-outfit, the combination with a switching device containing a circle of stationary contacts, of a rotatable switch-piece, a rotatable transmitter having its axis of rotation coincident with the switchpiece, means connecting the switch-piece with the transmitter whereby the latter is turned to set the switch-piece.

12. In a telephone outfit, a case, a rotatable transmitter comprising a mouth-piece on the outside of the case and a hub within the case, a contact-piece on the hub a circle of stationary switch-points arranged in operative relation to sald contact-piece, and a' dial-plate on the hub.

13. In a telephone outfit, the combination of a switching-device having a circle of stationary switch-points, a rotatable transmitter having its axis of rotation coincident with the center of the circie of switch-points and a my name to this specification in the presence contact-piece on the transmitter adapted to ok tWo subscrlblng witnesses close the circuit through any selected one of r Y y the switch-points by the rotation of the trans- ALBERrl KOCH AN 5 mitter, and an indicating device operating to Witnesses.

show the positlon of the contact-plece. EDWARD E. OsBoRN.

In testimony whereof I have hereunto set HOWARD PRICE. 

